Public functions unused locally changed to external

contracts/prize-pool/PrizePool.sol

@@ -416,14 +416,14 @@ abstract contract PrizePool is YieldSource, OwnableUpgradeSafe, RelayRecipient,
 
   /// @notice Gets the current prize.
   /// @return The total amount of assets to be awarded for the current prize
-  function awardBalance() public view returns (uint256) {
+  function awardBalance() external view returns (uint256) {
     return _currentAwardBalance;
   }
 
   /// @notice Updates and returns the current prize.
   /// @dev Updates the internal current award balance and captures reserve fees
   /// @return The total amount of assets to be awarded for the current prize
-  function captureAwardBalance() public returns (uint256) {
+  function captureAwardBalance() external nonReentrant returns (uint256) {
     uint256 tokenTotalSupply = _tokenTotalSupply();
     uint256 currentBalance = _balance();
     uint256 totalInterest = (currentBalance > tokenTotalSupply) ? currentBalance.sub(tokenTotalSupply) : 0;
@@ -897,7 +897,7 @@ abstract contract PrizePool is YieldSource, OwnableUpgradeSafe, RelayRecipient,
 
   /// @notice Check if the Prize Pool has an active Prize Strategy
   /// @dev When the prize strategy is detached deposits are disabled, and only withdrawals are permitted
-  function isShutdown() public view returns (bool) {
+  function isShutdown() external view returns (bool) {
     return address(comptroller) != address(0);
   }
 

contracts/prize-strategy/single-random-winner/SingleRandomWinner.sol

@@ -157,7 +157,7 @@ contract SingleRandomWinner is SingleRandomWinnerStorage,
 
   /// @notice Returns the number of seconds remaining until the prize can be awarded.
   /// @return The number of seconds remaining until the prize can be awarded.
-  function prizePeriodRemainingSeconds() public view returns (uint256) {
+  function prizePeriodRemainingSeconds() external view returns (uint256) {
     return _prizePeriodRemainingSeconds();
   }
 
@@ -356,13 +356,13 @@ contract SingleRandomWinner is SingleRandomWinnerStorage,
 
   /// @notice Returns the block number that the current RNG request has been locked to
   /// @return The block number that the RNG request is locked to
-  function getLastRngLockBlock() public view returns (uint32) {
+  function getLastRngLockBlock() external view returns (uint32) {
     return rngRequest.lockBlock;
   }
 
   /// @notice Returns the current RNG Request ID
   /// @return The current Request ID
-  function getLastRngRequestId() public view returns (uint32) {
+  function getLastRngRequestId() external view returns (uint32) {
     return rngRequest.id;
   }